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Method

A method can be defined for either a Program or Function Block. A method is 'attached' to the scope of an object. Methods can be used to :

Modularize re-usable pieces of code
Allow outside access to modify the state/behavior of an instance

Syntax

Method Declaration
METHOD <MethodName> : <ReturnType?>
// Variable declarations
VAR
    i : INT;
END_VAR

// Body
END_METHOD

A counter method
FUNCTION_BLOCK FB_Counter
VAR_OUTPUT
    Count : INT;
END_VAR

METHOD M_CountUp
    Count := Count + 1;
END_METHOD

END_FUNCTION_BLOCK

VAR
    instA : FB_Counter;
END_VAR

instA.M_CountUp();
instA.M_CountUp();
print(instA.Count); // 2

Syntax